86791949 has 4 divisors (see below), whose sum is σ = 90565536. Its totient is φ = 83018364.

The previous prime is 86791937. The next prime is 86791951. The reversal of 86791949 is 94919768.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86791949 - 2⁴ = 86791933 is a prime.

It is a super-2 number, since 2×86791949² = 15065684822437202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 86791949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86791249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1886759 + ... + 1886804.

It is an arithmetic number, because the mean of its divisors is an integer number (22641384).

Almost surely, 2^86791949 is an apocalyptic number.

It is an amenable number.

86791949 is a deficient number, since it is larger than the sum of its proper divisors (3773587).

86791949 is a wasteful number, since it uses less digits than its factorization.

86791949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3773586.

The product of its digits is 979776, while the sum is 53.

The square root of 86791949 is about 9316.2196732366. The cubic root of 86791949 is about 442.7512680206.

The spelling of 86791949 in words is "eighty-six million, seven hundred ninety-one thousand, nine hundred forty-nine".